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Full Discussion: Valid input compared with input
Top Forums Shell Programming and Scripting Valid input compared with input Post 302437530 by durden_tyler on Thursday 15th of July 2010 09:52:24 AM
Old 07-15-2010
Quote:
Originally Posted by ckozler
...
In short, I want to validate a users input in comparison with what I dictate as valid options-- the current logic I have tried time and time again does not seem to work as expected because it is simply doing a not equal check which occasionally fails because it is still hitting a valid option BUT just because the two strings do not equal each other, it errors out. This is not what I want.
...

You have the @selections array. And you have the @valid_options array. What you want to do is - loop through @selections array, and use grep to check if the current element is present in @valid_options array. If it is, you have a valid option; otherwise not.

Code:
$
$
$ perl -le '@valid_options = qw(valid1 valid2); @selections = qw(valid1 valid2 valid3 valid4);
            for $i (@selections) {print "$i is ", grep(/$i/,@valid_options) ? "Valid!" : "Invalid!"}'
valid1 is Valid!
valid2 is Valid!
valid3 is Invalid!
valid4 is Invalid!
$
$

tyler_durden
This User Gave Thanks to durden_tyler For This Post:
ckozler
 

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LEARN ABOUT CENTOS

gfx_mode_select

gfx_mode_select(3alleg4)					  Allegro manual					  gfx_mode_select(3alleg4)

NAME

       gfx_mode_select - Displays the Allegro graphics mode selection dialog.

SYNOPSIS

       #include <allegro.h>

       int gfx_mode_select(int *card, int *w, int *h);

DESCRIPTION

       Displays the Allegro graphics mode selection dialog, which allows the user to select a screen mode and graphics card.

       The  initial  values  at the addresses provided by card, w, and h are used as the default selections in the dialog if they are found in the
       driver and mode lists. If they are not found then the initial selections will be the first in each list. If you wish  to  ensure  that  the
       initial selection is always the first entry, then initialize the data at the addresses passed to the function to the value of 0 or -1.

       If the dialog is OK'd, it stores the selections at the addresses passed to the function.

RETURN VALUE

       See the gfx_mode_select_filter function for the return values.

SEE ALSO

       gfx_mode_select_ex(3alleg4), gfx_mode_select_filter(3alleg4), set_gfx_mode(3alleg4), gui_fg_color(3alleg4)

Allegro 							   version 4.4.2					  gfx_mode_select(3alleg4)
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